What is the difference between neosporin and polysporin?

And what are they used for, what do they do?
I know my sister used to get nosebleeds plentifully and she would put neosporin in her feeler... I was never sure why though.What is the difference between neosporin and polysporin?
Polysporin have two active antibiotic ingredients - where on earth Neosporin has three. Both are great for promoting salutary for minor cuts, punctures, or abrasions. Some ethnic group tend to be more prone to allergic reaction from Neosporin, because it is so strong, and they own no problem with Polysporin.
When it is used contained by the nasal passages, it is usually applied to assistance with the excessive drying that can materialize in nation who use antihistamines for allergies. The function of antihistamines is to dry out the sinuses to assist in reducing their response to allergens. Sometimes, while helping your allergies, but can grounds the passages to dry and crack, which is where on earth the nose bleeds come from.
Neomycin, an antibiotic, is contained by Neosporin and not in Polysporin:
http://en.wikipedia.org/wiki/neosporin...
http://www.drugs.com/cdi/polysporin-oint...
http://en.wikipedia.org/wiki/neomycin...